Run: 2026-02-20-01KHY7RGX8XSS181463WE53VTM

Run Details

Model:
Grok 4
Duration:
32.1s
Cost:
$0.014159
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
67.75% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The misty streets of Eldridge concealed dark secrets as Detective Harlan arrived at the grand yet foreboding Blackwell mansion under moonlight. He stepped out of his weathered sedan, gravel crunching beneath his boots, while distant thunder rumbled ominously in the night sky. Pushing open the creaking front door, he entered a dimly lit foyer adorned with antique portraits staring down accusingly at him. A faint metallic scent hung in the air, mingling with the musty odor of old books and forgotten memories from years past. Upstairs, a scream had echoed earlier, drawing him here, but now silence enveloped the house like a suffocating shroud of mystery. Harlan climbed the spiral staircase cautiously, his hand gripping the revolver tightly, heart pounding with each deliberate step he took. At the top, he found the study door ajar, revealing a chaotic scene of overturned furniture and scattered papers everywhere. In the center lay the body of millionaire Elias Blackwell, blood pooling around his head from a brutal, fatal wound. No weapon was visible nearby, and the window stood open, curtains billowing as if someone had just fled into the night. Harlan knelt to examine the corpse, noting the absence of struggle marks, suggesting the killer was known to the victim somehow.
created_at"2026-02-20T19:17:24.531Z" 2/20/2026, 7:17:24 PM
model"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency23734
moderation_latency(null)
generation_time32061
tokens_prompt46
tokens_completion338
native_tokens_prompt719
native_tokens_completion902
native_tokens_completion_images0
native_tokens_reasoning651
native_tokens_cached679
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.01415925
router(null)
provider_responses
0
endpoint_id"d40bef9d-6936-4c57-9749-bf7399de4a77"
id"fe325a4f-ace1-e092-4b64-d2508d0d0a59"
is_byokfalse
latency184
model_permaslug"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
provider_name"xAI"
status200
api_type"completions"
id"gen-1771615044-2c7XzJD3eflFBuk5iGlp"
upstream_id"fe325a4f-ace1-e092-4b64-d2508d0d0a59"
total_cost0.01415925
cache_discount0.00152775
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
67.75% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
121
221
322
421
520
620
720
821
921